Malicious PDF — malware analysis report

Static analysis result for SHA-256 51d862a37c6e03c1…

MALICIOUS

PDF

91.2 KB Created: 2020-09-03 13:30:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e3f8c4e9e6d010c0eeba26e078db052 SHA-1: a84ad95155b4084fcffc7d1c9b652b3c6265a02c SHA-256: 51d862a37c6e03c148edd5c3a8be1b1ea22d98027d8c3c2755146c987ce747fe
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, with a critical heuristic firing indicating it's a link farm. One of these links, 'https://ttraff.link/wix?keyword=android+navigation+bar+height+adb', is identified as a known malicious redirector. The document body, though heavily obfuscated, contains this same URL, suggesting the primary intent is to trick the user into visiting a malicious site.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.link/wix?keyword=android+navigation+bar+height+adb
    • https://cdn.shopify.com/s/files/1/0432/5123/7032/files/79921213229.pdf
    • https://cdn.shopify.com/s/files/1/0431/9094/3904/files/kawuzur.pdf
    • https://cdn.shopify.com/s/files/1/0434/5508/6742/files/66961628338.pdf
    • https://cdn.shopify.com/s/files/1/0437/6618/6135/files/79254582672.pdf
    • https://cdn.shopify.com/s/files/1/0432/0342/8515/files/boxavedo.pdf
    • https://static.usrfiles.com/ugd/a31856_59721396f1ea4984a4b1f85a900df181.pdf
    • https://static.usrfiles.com/ugd/b8c837_9a1b85329e56487085f77b286c4c3d0d.pdf
    • https://static.usrfiles.com/ugd/1cc777_8e5b1d28311c4166b3da365ed9b0ffc1.pdf
    • https://static.usrfiles.com/ugd/b8c837_15f594087dc04933bad9918a5812b228.pdf
    • https://static.usrfiles.com/ugd/9ced5d_974f583d60c943fea41fd95a0dbcc9ee.pdf
    • https://static.usrfiles.com/ugd/ce0e6d_ab94f31927494de89a3046d3dac51516.pdf
    • https://static.usrfiles.com/ugd/d775a9_7e89cb2dd18b44ee9c1e292dee07c21e.pdf
    • https://static.usrfiles.com/ugd/0994f9_f70e4dc0fee049f4a6318e59b7720a4f.pdf
    • https://static.usrfiles.com/ugd/9d869b_715e35b45bec4fa2af9ac880874317cf.pdf
    • https://static.usrfiles.com/ugd/6cf392_189177ba8d994f9aa1bb002fcc0c2b97.pdf
    • https://static.usrfiles.com/ugd/455f95_fa69a1a59fcf462f8338cca52d26ac8c.pdf
    • https://static.usrfiles.com/ugd/275374_425cf2515dd14dea98e65ebfe5a40f18.pdf
    • https://static.usrfiles.com/ugd/e6092c_34d6c21b74c74c58a4eb33c93b1a5820.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011035.bin
391ec26e511354e3b33b9162acb7f1dfbbbaa4b9f4e9852a579fdd761f7390c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x11035 3264 bytes
font_01_sfnt_off00011bf6.bin
84c25eacae760feac6fa5c4826331c25fc4844bb5e567340ebf559bf1828a075
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF6 5064 bytes
font_02_sfnt_off00012d2f.bin
1e1d001f8eecaa47dae37fe81eda17aaf3167571f511d98e9e8fc9310e4da2af
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D2F 15936 bytes